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A hydrogen atom, initially at rest in the n = 5 quantum state, undergoes a transition to the ground state, emitting a photon in the process. What is the speed of the recoiling hydrogen atom? Number Units

A hydrogen atom, initially at rest in the n = 5 quantum state, undergoes a transition to the ground state, emitting a photon in the process. What is the speed of the recoiling hydrogen atom? Number Units

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A hydrogen atom, initially at rest in the n = 5 quantum state, undergoes a transition to the ground state, emitting a photon in the process. What is the speed of the recoiling hydrogen atom?
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